Segmented Touch Electrodes for Noise Reduction in Large Displays
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Solution Overview
Problem
Large-sized touch display apparatuses face challenges with low accuracy in touch recognition and a high probability of accidental touches due to noise interference and the cumulative effect of long touch electrodes.
Innovation Solution
The display panel incorporates a mutual-capacitance touch film layer with a drive electrode unit and a sensing electrode unit, where first and second touch electrodes are arranged in a specific configuration to minimize noise interference by ensuring they are independent of each other in the same direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display area is increased, then the touch area becomes larger, but the accuracy of touch recognition becomes lower and accidental touch phenomena occur more frequently
Solution Approach 1:
The touch electrode in the same straight line is divided into two independent electrodes (first touch electrode and second touch electrode) that are spaced apart. This segmentation reduces noise accumulation along the electrode length, thereby improving touch recognition accuracy while maintaining a large touch area.
2Area of stationary object
If the touch electrode length is increased to cover larger display area, then the touch coverage is improved, but noise interference increases and touch recognition accuracy decreases
Solution Approach 1:
The long touch electrode is segmented into two shorter electrodes (first and second touch electrodes) spaced apart in the same straight line. This reduces the cumulative noise effect along the electrode length while maintaining coverage of the larger display area.
Solution Approach 2:
A spacing interval is introduced between the first and second touch electrodes, acting as an intermediary that isolates noise accumulation. This spacing prevents noise from propagating along the entire electrode length, reducing interference while maintaining touch coverage.
3Device complexity
If traditional single touch electrode configuration is used, then the structure is simple, but noise accumulates along the electrode and reduces touch recognition accuracy
Solution Approach 1:
The single touch electrode is divided into two spaced-apart electrodes (first and second touch electrodes) in the same straight line. This simple segmentation effectively reduces noise accumulation without significantly increasing structural complexity, improving touch recognition accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration improves the signal-to-noise ratio of the touch electrodes, enhancing the accuracy of touch recognition and reducing the occurrence of accidental touches, especially in flexible display panels that change orientation.
Implementation Method 1
a mutual-capacitance touch film layer 2 that are stacked. The mutual-capacitance touch film layer 2 includes a drive electrode unit 321 and a sensing electrode unit 322
Data Source
AI summary
A display panel includes a mutual-capacitance touch film layer with a drive electrode system and a sensing electrode system. One of the drive electrode system and the sensing electrode system is a first touch electrode system, and the other is a second touch electrode system. The first touch electrode system includes a plurality of first touch electrodes that extend in a first direction and that are arranged in a second direction, and a plurality of second touch electrodes that extend in the first direction and that are arranged in the second direction.